I wonder why they designed centre caps with such a short life expectancy? In all other respects they are well designed. Some owners have reported similar problems with the alloy wheels - corrosion under the paint or lacquer - maybe it is due to poor preparation or it could be an unforeseen reaction to the salt that we put on UK roads?You can buy adhesive stick-on Griffins, stick them over the corroded ones, and then you have new ones that will corrode in only a year or two.
I did exactly that on the winter wheels I bought. Straight over the decals of the new make of rim. These got rain damaged after a while, water got under the plastic layer you mention, and corroded the metal base layer.My brother now has my Ampera, however, I had the wheels refurbished before he got it. I bought these but since C19 kicked in I cant visit to try them They are totally flat relief with a plastic layer over the top, maybe a couple of mm thick and a curved outer edge. I haven't decided if I am going to try sticking them over the current badge or try and remove it and hopefully have a flat surface underneath.
This does sound interesting. Have you fitted them to your car? Picture?
I see and understand the problem. Shame. I suppose it could be made in white and the sprayed black or silver, if the white were stronger. Or could add a sticker with the logo. Still, maybe I'll have a go at stickering my grotty things.Here's pic of the one I made. Not easy photoing black things, but have cranked up the gamma-correction, so you can see the 2 prongs that snapped off. And as I write this, I've given another prong a tweak, and snapped that as well! Part of the problem is that this black ABS seems to be rather a brittle flavour of ABS, at least compared to the white I use a lot, which feels much more like a nylon, and prints a lot tougher, somehow. It's a slow item to print, so I'd probably end up charging a fiver each. I'm not sure it's worth it tbh.
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I did the same and the went back to looking like the old ones as soon as winter started up.